161128078 has 4 divisors (see below), whose sum is σ = 241692120. Its totient is φ = 80564038.

The previous prime is 161128069. The next prime is 161128117. The reversal of 161128078 is 870821161.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40282018 + ... + 40282021.

It is an arithmetic number, because the mean of its divisors is an integer number (60423030).

Almost surely, 2^161128078 is an apocalyptic number.

161128078 is a deficient number, since it is larger than the sum of its proper divisors (80564042).

161128078 is an equidigital number, since it uses as much as digits as its factorization.

161128078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80564041.

The product of its (nonzero) digits is 5376, while the sum is 34.

The square root of 161128078 is about 12693.6235173413. The cubic root of 161128078 is about 544.1564010184.

The spelling of 161128078 in words is "one hundred sixty-one million, one hundred twenty-eight thousand, seventy-eight".